Haruko Momoi is a Japanese voice actress and singer/songwriter. She also produces an all-female pop group called Afilia Saga. She was born in Tokyo, Japan and is affectionately referred to as 'Halko' by her fans, a nickname she gave herself which is inspired by HAL 9000, the onboard computer of the Discovery in the movie 2001: A Space Odyssey.

Haruko Obokata is a former stem-cell biologist and research unit leader at Japan's Laboratory for Cellular Reprogramming, Riken Center for Developmental Biology. She claimed to have developed a radical and remarkably easy way to make stimulus-triggered acquisition of pluripotency cells that could be grown into tissue for use anywhere in the body. Riken, however, eventually launched an investigation in response to allegations of irregularities in images appearing in several articles she authored, including the paper announcing the discovery of STAP cells. The ensuing scandal over STAP cells has since become one of the world's best-known scientific frauds alongside the Schön scandal and Hwang Woo-suk's cloning experiments.

Haruko Okamoto is a Japanese figure skater who is now a coach. She retired from skating shortly after placing 26th in the 1968 Winter Olympic Games. Her sister is Ayumi Ishida, who is a singer and actress.